摘要
水泥混凝土路面是典型的板状结构,周围环境条件如温度、相对湿度以及风速等对混凝土的浇筑、压实、饰面以及长期路用性能影响较大。高温条件对早期混凝土质量如工作性、早期强度和塑性收缩以及长期性能如强度、体积稳定性和耐久性的影响不可忽视。在总结高温条件对混凝土早期、长期质量影响的基础上,认为路面混凝土浇筑时控制其温度对路面的长期性能至关重要。对目前通常采用的控制混凝土浇筑时温度的措施如改善配合比、降低混凝土组分温度和合理的养护措施等作了详细介绍。
The impacts of ambient temperature,relative humidity and wind speed on concrete placement,compaction,finishing and the long-term properties are significant, especially for cement concrete pavement——a typical slab structure.The influence of hot weather on early-age concrete qualities such as workability, strength and plastic shrinkage and long-term performances like strength, volumetric stability and durability can not be ignored.The significance of controlling the concrete temperature during the process of mixing,placement and compaction for the long-term performances can not be over-emphasized,based on the conclusions of the hot weather around the pavement effects on concrete early-age and long-term qualities.The current methods of controlling concrete temperature such as modifying of concrete proportion,decreasing the temperature of concrete ingredients and taking some curing and protection measures are presented in detail.
出处
《混凝土》
CAS
CSCD
北大核心
2007年第6期99-103,共5页
Concrete
关键词
高温条件
水泥混凝土路面
温度控制
早期养护
hot weather condition
cement concrete pavement
temperature controlling
early-age curing
